Disorder-induced stabilization of the pseudogap in strongly correlated systems.

@article{Chiesa2008DisorderinducedSO,
  title={Disorder-induced stabilization of the pseudogap in strongly correlated systems.},
  author={Simone Chiesa and Prabuddha B. Chakraborty and Warren E. Pickett and Richard T. Scalettar},
  journal={Physical review letters},
  year={2008},
  volume={101 8},
  pages={
          086401
        }
}
The interplay of strong interaction and strong disorder, as contained in the Anderson-Hubbard model, is addressed using two nonperturbative numerical methods: the Lanczos algorithm in the grand canonical ensemble at zero temperature and quantum Monte Carlo simulations. We find distinctive evidence for a zero-energy anomaly which is robust upon variation of doping, disorder, and interaction strength. Its similarities to, and differences from, pseudogap formation in other contexts, including… 

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References

SHOWING 1-10 OF 13 REFERENCES

C8

THE EXISTING CULTURAL AND TOPOGRAPHIC DATA SHOWN ON THESE DRAWINGS HAS BEEN PREPARED, IN PART, BASED UPON INFORMATION FURNISHED BY DAN PRICE LAND SURVEYING AND APEX ENGINEERING PLLC . WHILE THIS

Phys

  • Rev. B71, 184510
  • 2005

Rev

  • Mod. Phys. 66, 763
  • 1994

Phys

  • Rev. Lett. 94, 046402
  • 2005

and F-C

  • Zhang 5 Phys. Rev. Lett. 95, 137001,
  • 2005

Strong on-site disorder leads to a severe sign problem at half-filling contrary to the ∆ = 0 situation

    Phys

    • Rev. Lett. 93, 147004
    • 2004

    Phys

    • Rev. B44, 6011
    • 1991

    Phys

    • Rev. Lett. 91, 136403
    • 2003

    Phys

    • Rev. B77, 54202,
    • 2005